Orthodontics
Mahesh Jain; Dolly Patel
Abstract
Aim: With the increased use of cone beam computed tomography (CBCT) scans in orthodontic diagnosis and treatment planning, validation of using radiographic images obtained from CBCT instead of multiple conventional radiographs is needed. Hence, the present study was designed to assess the differences ...
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Aim: With the increased use of cone beam computed tomography (CBCT) scans in orthodontic diagnosis and treatment planning, validation of using radiographic images obtained from CBCT instead of multiple conventional radiographs is needed. Hence, the present study was designed to assess the differences between cephalometric measurements taken from manual tracings (MT), digitized lateral cephalograms (DLC) and CBCT lateral cephalograms scansMethods: Conventional lateral cephalograms and CBCT scans from ten subjects from departmental archives were used to assess the three methods: manual tracings, digitized lateral cephalograms, and CBCT lateral cephalograms. Seventeen measurements were evaluated and retraced after a 7-day period. The intra examiner errors was assessed using the paired t test and Dahlberg formula. The Pearson correlation test and ANOVA test evaluated the differences between the methods.Results: Most of the measurements had intra-examiner reliability in all three methods. Measurements were significant among methods were Y-axis, U1-Apog (degree and mm), U1-NA, L1-NB (degree and mm), L1-Apog, and interincisal angle.Conclusion: All three methods proved to be reliable and reproducible with minimum error in the measurement of lateral cephalograms. The CBCT scan, advised for complex cases, can be used to generate lateral cephalogram images, which may reduce the need for multiple radiographs, thereby reducing radiation exposure and cost.
Orthodontics
Foroozan Farahbod; Sepideh Dadgar; Farhad Sobouti; Ali Malekzadeh Shafaroudi; Sajad Yousefi; Ali Nowruzy
Abstract
Background: Superimposition of left and right structures is an issue in lateral cephalometric radiographs in dentistry, making it challenging to measure structures, including the gonial angle. Panoramic radiography contains fewer superimposing structures; therefore, it could measure the gonial angle. ...
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Background: Superimposition of left and right structures is an issue in lateral cephalometric radiographs in dentistry, making it challenging to measure structures, including the gonial angle. Panoramic radiography contains fewer superimposing structures; therefore, it could measure the gonial angle. This study aimed to compare the gonial angle in panoramic and lateral cephalometric radiographs in different skeletal patterns.Methods: In this cross-sectional study, 240 panoramic and lateral cephalometric radiographs were collected from the archives of Sari Dental School. The gonial angle of each radiograph was traced and measured with a conveyor. Data analysis was performed using ANOVA and paired t-test, and P-value <0.05 were considered significant.Results: The paired t-test of the gonial angle did not show a statistically significant difference between different skeletal groups when measured using panoramic and lateral cephalometric radiographs. According to the results, the p-value of the difference between the right and left gonial angles in skeletal class III patients (p=0.019) was obtained larger than the test level (p=0.05). Therefore, it can be concluded that there is a statistically significant difference between the size of the left and right gonial angles in panoramic radiographs of skeletal class III patients. Conclusion: Panoramic radiography can be an accurate alternative to lateral cephalometric radiographs for measuring the gonial angle in different skeletal patterns due to the lower radiation it exposes to the patient.
Sidra Butt; Imtiaz Ahmed
Abstract
Background: The forensic anthropologists have been vastly studied the dimorphism in teeth, hair, pelvis, skull and in bone sizes.
Objectives: To investigate the gender dimorphic potential of cephalometric parameters. Materials and Methods: Thirteen angular and twenty-one linear lateral cephalometric ...
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Background: The forensic anthropologists have been vastly studied the dimorphism in teeth, hair, pelvis, skull and in bone sizes.
Objectives: To investigate the gender dimorphic potential of cephalometric parameters. Materials and Methods: Thirteen angular and twenty-one linear lateral cephalometric measurements were analyzed on randomly selected manual tracings of sixty-nine male and sixty-nine female cephalograms between the ages twenty to fifty years. Results: 91.3% males correctly classified in the data, on the basis of discriminant function we made, similarly, 97.1% females were correctly classified in their specific group by the help of this discriminant function. The percentage of skulls correctly classified with this function was 94.2%.
Conclusions: 94.2% of original grouped cases correctly classified. For higher results extensive research with large sample size and both linear and angular cranial dimorphic traits for gender identification is proposed.
